<?php
/**
 ***** 扶摇而上、抱守本真 ******
 * @author Dana
 * @Date 2021/6/30
 */


/*
PHP credit card number generator
Copyright (C) 2006 Graham King graham@darkcoding.net
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
$visaPrefixList[] = "4539";
$visaPrefixList[] = "4556";
$visaPrefixList[] = "4916";
$visaPrefixList[] = "4532";
$visaPrefixList[] = "4929";
$visaPrefixList[] = "40240071";
$visaPrefixList[] = "4485";
$visaPrefixList[] = "4716";
$visaPrefixList[] = "4";
$mastercardPrefixList[] = "51";
$mastercardPrefixList[] = "52";
$mastercardPrefixList[] = "53";
$mastercardPrefixList[] = "54";
$mastercardPrefixList[] = "55";
$amexPrefixList[] = "34";
$amexPrefixList[] = "37";
$discoverPrefixList[] = "6011";
$dinersPrefixList[] = "300";
$dinersPrefixList[] = "301";
$dinersPrefixList[] = "302";
$dinersPrefixList[] = "303";
$dinersPrefixList[] = "36";
$dinersPrefixList[] = "38";
$enRoutePrefixList[] = "2014";
$enRoutePrefixList[] = "2149";
$jcbPrefixList[] = "35";
$voyagerPrefixList[] = "8699";
/*
'prefix' is the start of the CC number as a string, any number of digits.
'length' is the length of the CC number to generate. Typically 13 or 16
*/
function completed_number($prefix, $length)
{
    $ccnumber = $prefix;
    # generate digits
    while (strlen($ccnumber) < ($length - 1)) {
        $ccnumber .= rand(0, 9);
    }
    # Calculate sum
    $sum = 0;
    $pos = 0;
    $reversedCCnumber = strrev($ccnumber);
    while ($pos < $length - 1) {
        $odd = $reversedCCnumber[$pos] * 2;
        if ($odd > 9) {
            $odd -= 9;
        }
        $sum += $odd;
        if ($pos != ($length - 2)) {
            $sum += $reversedCCnumber[$pos + 1];
        }
        $pos += 2;
    }
    # Calculate check digit
    $checkdigit = ((floor($sum / 10) + 1) * 10 - $sum) % 10;
    $ccnumber .= $checkdigit;
    return $ccnumber;
}

function credit_card_number($prefixList, $length, $howMany)
{
    for ($i = 0; $i < $howMany; $i++) {
        $ccnumber = $prefixList[array_rand($prefixList)];
        $result[] = completed_number($ccnumber, $length);
    }
    return $result;
}

function output($title, $numbers)
{
    $result[] = "<div class='creditCardNumbers'>";
    $result[] = "<h3>$title</h3>";
    $result[] = implode('<br />', $numbers);
    $result[] = '</div>';
    return implode('<br />', $result);
}

#
# Main
#
echo "<div class='creditCardSet'>";
$visa16 = credit_card_number($visaPrefixList, 19, 10);
echo output("VISA 16 digit", $visa16);
echo "</div>";
/*
$visa16 = credit_card_number($visaPrefixList, 16, 10);
echo output("VISA 16 digit", $visa16);
echo "</div>";
echo "<div class='creditCardSet'>";
$visa13 = credit_card_number($visaPrefixList, 13, 5);
echo output("VISA 13 digit", $visa13);
$amex = credit_card_number($amexPrefixList, 15, 5);
echo output("American Express", $amex);
echo "</div>";
# Minor cards
echo "<div class='creditCardSet'>";
$discover = credit_card_number($discoverPrefixList, 16, 3);
echo output("Discover", $discover);
$diners = credit_card_number($dinersPrefixList, 14, 3);
echo output("Diners Club", $diners);
echo "</div>";
echo "<div class='creditCardSet'>";
$enRoute = credit_card_number($enRoutePrefixList, 15, 3);
echo output("enRoute", $enRoute);
$jcb = credit_card_number($jcbPrefixList, 16, 3);
echo output("JCB", $jcb);
echo "</div>";
echo "<div class='creditCardSet'>";
$voyager = credit_card_number($voyagerPrefixList, 15, 3);
echo output("Voyager", $voyager);
echo "</div>";*/
